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15999 W CORRAL HOLLOW RD Project No.2019-00027 Page 19 <br /> Table 3. <br /> San Joaquin County Soil Survey <br /> Elected Soil Properties of On-Site Soils <br /> Soil Name Depth Salinity Soil Perme- Septic tank <br /> -Map Unified Soil Classification mmhos/ Reaction ability absorption <br /> Unit 275 (�n) cm pH (in/hr)** fields <br /> 0-3: Sandy loam; SM <2 7.4-8.4 Moderately Very <br /> Wisflat 3-10: Gravelly sandy loam;SP <2 7.4-8.4 Rapid limited; <br /> 10-14: Bedrock; --- --- --- Permeability <br /> depth to <br /> bedrock <br /> 0-6: Loam <2 7.4-8.4 Moderate Very <br /> Arburua 6-22: Loam <2 7.9-8.4 Permeability limited; <br /> 22-28: Bedrock --- --- depth to <br /> bedrock <br /> 0-5: Sandy loam;SM <2 7.4-8.4 Moderately Very <br /> San 5-22: Sandy loam;SM <2 7.9-8.4 Rapid limited; <br /> Timoteo 22-26: Weathered bedrock; --- ___ --- Permeability depth to <br /> bedrock <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> *See description of the map unit for composition and behavior characteristics of the map unit <br /> **Soil Data Explorer,https://casoilresource.lawr.ucdavis.edu/sde/?series=wisflat <br /> One four-inch diameter soil boring was advanced on the site to a total depth of between 36"and 42" <br /> inches below ground surface (bgs),conforming with the County standards for a shallow percolation <br /> test. Percolation test pipe was set at 37"bgs. Generally,the soil encountered in the boring is similar <br /> to the soils reported by the San Joaquin County Soil Survey for the area (USDA, 1992). The table <br /> below presents the soil log for each site's deep soil boring. <br /> Table 4. <br /> Soil Boring Logs <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> Site 300-Building T8021 <br /> 0-0.5 Brown,dry,sandy loam with SM <br /> gravels <br /> 0.5-3.0 Brown,dry,sandy loam SM <br /> A visual inspection of the soils from on-site drilling indicates high potential for percolation in sandy <br /> loam layers as observed for the site. A percolation test is the best method to determine the suitability <br /> of the soils for a septic disposal area. Please see the next section for percolation test results. <br /> Petralogix Engineering,Inc. <br /> 26675 BrueNa Road,Galt,Ca 95632 <br /> (209)-400-5729 <br /> www.petralogix.com <br />